Modern Concepts in Earth Science Course 13 Mineral

Modern Concepts in Earth Science Course 13 - Mineral Resources Geological Certainty

Modern Concepts in Earth Science Mineral Resources - Terminology Ore Gangue

Modern Concepts in Earth Science Processes that form Mineral Deposits Distribution of important metal deposits

Modern Concepts in Earth Science Types of Hydrothermal Deposits Porphyry Deposits VMS Deposits Epithermal Deposits (Volcanogenic Massive Sulfide) Sedex Deposits Unconformity Deposits

Modern Concepts in Earth Science Volcanogenic Massive Sulfide (VMS) Deposits Massive Sulfide Lens

Modern Concepts in Earth Science Volcanogenic Massive Sulfide (VMS) Deposits

Modern Concepts in Earth Science Types of Hydrothermal Deposits - Vein Deposits 1

Modern Concepts in Earth Science Types of Hydrothermal Deposits - Vein Deposits Veins of gold Deformed sedimentary and volcanic rocks Quartz veins with gold occupying faults Continental crust Ocean crust Mantle Metamorphism causing fluid evolution Granite intrusion

Modern Concepts in Earth Science Types of Hydrothermal Deposit - Porphyry Copper

Modern Concepts in Earth Science Types of Hydrothermal Deposit - Porphyry Copper

Modern Concepts in Earth Science Types of Hydrothermal Deposit - Porphyry Copper Ores

Modern Concepts in Earth Science Types of Hydrothermal Deposit - Epithermal Deposits

Modern Concepts in Earth Science Types of Hydrothermal Deposit - Epithermal Deposits

Modern Concepts in Earth Science Types of Hydrothermal Deposit - Skarns "Classic" skarn associated with plutons

Modern Concepts in Earth Science Magmatic Mineral Deposits – Crystal Segregation Ground surface Funnel-shaped mass of basaltic magma. Crystal setting: dense crystals of chromite form in the magma and “rain” to the floor of the chamber accumulating in layers. Layers already cystallized Conduit from magma source. Thickness of magma body can be as much as several km.

Modern Concepts in Earth Science Magmatic Mineral Deposits – Sulfide Liquid Immiscibility Pentlandite Pyrrhotite

Modern Concepts in Earth Science Magmatic Mineral Deposits - Kimberlites

Modern Concepts in Earth Science Sedimentary Deposits - Evaporites

Modern Concepts in Earth Science Sedimentary Deposits – Strata-bound and Iron 18 km Stratabound Mineral Deposits Iron Deposits

Modern Concepts in Earth Science Sedimentary Deposits - Banded Iron Formations (BIF)

Modern Concepts in Earth Science Placer Deposits “mother lode” ore in quartz veins placers formed in rapids, waterfalls, and potholes buried placers formed in point bars

Modern Concepts in Earth Science Placer Deposits

Modern Concepts in Earth Science Residual Deposits Gossan outcrop Dissolution of Fe & Cu sulfides Fe oxide residue Reaction with oxygenated rain water Fe 2+, Cu 2+ in acid solution Watertable Reaction of primary Cu sulfide (e. g. chalcopyrite, Cu. Fe. S 2) with Cu 2+ in acid solution to from enriched zone of chalcocite (Cu 2 S). Primary FE/Cu sulfides

Modern Concepts in Earth Science The Role of Plate Tectonic Setting in Controlling Distribution of Ore Deposits

Modern Concepts in Earth Science The Role of Plate Tectonic Setting in Controlling Distribution of Ore Deposits 1 2 3 4